Patents by Inventor Stephen L. Michaels

Stephen L. Michaels has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Production of lactic acid by continuous fermentation using an inexpensive raw material and a simplified method of lactic acid purification
    Patent number: 4771001
    Abstract: The disclosure describes a method for producing lactic acid from carbohydrate-containing media by continuous fermentation utilizing particular methods of media pretreatment, cell-recycle fermentation, fermentation broth acidification, and lactic acid separation.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: September 13, 1988
    Assignee: Neurex Corp.
    Inventors: Richard B. Bailey, Dilip K. Joshi, Stephen L. Michaels, Richard A. Wisdom
  • Production of lactic acid by continuous fermentation using an inexpensive raw material and a simplified method of lactic acid purification
    Patent number: 4698303
    Abstract: The invention provides a method for producing lactic acid by continuous fermentation utilizing particular methods of media pretreatment, cell-recycle fermentation, fermentation broth acidification, and lactic acid separation.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: October 6, 1987
    Assignee: Engenics, Inc.
    Inventors: Richard B. Bailey, Dilip K. Joshi, Stephen L. Michaels, Richard A. Wisdom
  • Use of aqueous triethylamine/phosphoric acid salt solutions to extract water and triethylamine from solutions thereof in organic solvents
    Patent number: 4326082
    Abstract: Triethylamine and water are simultaneously removed from solutions in organic solvents, by liquid/liquid extraction with concentrated aqueous solutions of (C.sub.2 H.sub.5).sub.3 N.H.sub.3 PO.sub.4 which preferably contain free phosphoric acid as well. Upon heating of the resulting extract, the water and amine taken up are boiled off and the extractant regenerated. The method is of particular value in the preparation of aqueous coating compositions comprising reaction products of polyether epoxides and H.sub.3 PO.sub.4 in organic media. The reaction product is salified with triethylamine in excess, in the presence of added water. The organic solvent is boiled off, together with the excess amine and some of the water, to form an aqueous dispersion of the salified product and a distillate which can be processed by the method of the invention. The recovered solvent, water and amine may be recycled.
    Type: Grant
    Filed: April 7, 1980
    Date of Patent: April 20, 1982
    Assignee: The Dow Chemical Company
    Inventors: Patrick H. Martin, Stephen L. Michaels